package com.dd.reggie.config;

import com.dd.reggie.common.JacksonObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    /**
     * 调用addResourceHandlers方法进行静态资源映射
     * @param registry
     */
    @Override          //重写父类WebMvcConfigurationSupport的方法addResourceHandlers
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始静态资源映射...");
        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
    }

    /**
     * 扩展MVC框架的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {

        //创建自己的消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置消息转换器，底层使用Jackson将Java对象转成JSON
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //追加到MVC转换器集合中，注意放在第一位，默认优先使用0号位
        converters.add(0, messageConverter);
    }
}
